There are 3 rounds
First round is basic. If communication is good enough they select for telephonic. Telephonic interview goes on even if the lines not clear , because the interviewer doesn't really care what you're saying. So she'll ask everything randomly and catches some questions where you get stuck . In the next round there will be few more questions asked on the same questions that you didn't answer in previous round. And they go in depth about the same question. Finally hr will explain the process of train n hire and 1.2lacs fees